Apparatus for separating solids from liquids.



No. ss5,450.- v I PATEN'TED APR. 21, 1908. E. w. DEMING.

APPARATUS FOR SEPARATING- SOLIDS FROM LIQUIDS. APPLIUAIION rILnD'mwA. 1905. I

fliifrzesaea: A frcventars citizen of the United States,

York, in the county of New of New York, have invented certain new and EUGENE W. DEM'INVG, OF NEW YORK, N. Y.

AfPA RATUS FOR SEPARATING SOLIDS FROM LIQUIDS.

To all whom it may concern: I Be it known that LEUGENE W. DEMING, a residing at New York and State useful Im rovements in Apparatus-forSe a rating So ids from Liquids, of which the ollowing is a specification. 4

In my prior patent Number 531,460, at

ented December 25, 1894, I have descrl ed and claimed a .rocess of and ap aratus for defecating sacc arine solutions, t e apparatus comprising essentially a di ester or heater, an absorber or cooler, an an open settling tank designed to operate under con tinuous fiow, suitable conduits bein provided whereby the liquid to be treated is led through the several devices in succession,

As therein described the cold liquid first enters the absorber, passin thence through the digester in which it is ighly heated, preferably to a temperature exceeding its atmos- 'heric boiling From the digester then reenters the absorber and .is cooled therein to a tem erature not exceeding its atmospheric bo ing point, the coolin being effected by transfer of heat to the co (1 liquid passing through the absorber on its way to the dl ester. The partially cooledliquid is then led to the continuous settling tank where the suspended impurities are separated.

LIy present invention is apparatus for the treatment of liquids carryin solids in susfi pension, and-specifically for t e treatment of saccharine solutions, the object of the invenheretofore been .0

tion being to-separate the solids in a more economical and expeditious manner than has possible, and in the case of saccharine and. similar solutions to avoid the ossibility of deterioration of the solutions by ermentation or otherwise.

The invention is based upon the observation that While the specific gravity of liquids and solutions is reduced at high tem eratures, the specific gravity of suspendedso ids or co- 8. lated impurities a ected, from which it follows that such solids or impurities will separate with comparative rapidity and completeness from iighly heated li uids. A further advantage in maintainingt e liquid under pressure dur- "ing the settling lies in the fact which I have observed that under these conditions the separation of gas bubbits, which under ordi- Specification 01 Letters Patent.

- Application filed. December 4, 1905. Serial No. 290,250.

point; the superheated liquid lugs or brackets 9 are be pa 'tan ,as by brac is substantially un- Patented April 21, 1908.

nary circumstances tend to cling to the solid particles and to maintain them in suspension, is largely avoided.

For a full'understanding of my "invention;

reference is made to the accompanying drawings showing a digester and absorber of conventional form in elevation, and the improved settling tank in vertical section,

Referring to the drawings, 1 represents a digester which may conveniently be of the type shown in my prior patent Number 531,460 above referred to; 2 man absorberof the tial ature be ngthe endent passages for er of heat may be e 1provision of two inde- 1% ui d whereby at'rans ected between two bodies or between two portions of the same body of liquid. The construction of these devices is well understood by the art and they need not be herein.

3 represents a closed settling tank corngrising in the particular form shown a cylinrical sheet-metal body 4 to which is secured.

a conical bottom 5 having an outlet 6 for the precipitate the bottom is suitably reinforced as shown at 7, 8, and appropriate su portin provided. he tan is provided with a liquid-tight cover 10, of sheet-metal, referably inwardly arched to withstand hig internal pr sures of liquid.

11 is an interior pipe or partial artition which is secured to the cover 10 an entirely supported thereby as shown, or may rtially sup orted from the body of the liets 28. The, urpose of this ipe or partition, hereinafter designated. the uptake", is torovide a'tortuous passage for the liquid wit in the tank, the entering liquidcarryin solid matter in suspension being' introduce through ipes 12, 12 and flowing downwardly throu li the annular passage 13 between the u ta e 11 and the cylindrical, body 4 of t e tank; the liquid flows around the base of the uptake 11, upwardl' through the same, and escapes from the tan inafter described. The uptake is referably of substantially conical form, the use being Wider than-the top as herein shown and as described in my prior paten t Nu niber 566,726, patented August 25, 1896, in order that the upward rate of movement of liquid in he lower portion of the tmfl; may be relatively slow and the solids effectively separated.

those skilled in urther described may be general typmtherein described, itsessen I 1 at 14, passing thence to the absorber as herethe ap i to the inlets 12, 12 of the settling tank 3,

the tem erature and pressure of the liquid being su )stantially maintained during its assage through the tank and during the sett ing or precipitation of the solids or impurities. To assist in maintaining the temperature the tank may be covered with a heat-insulating coating 29. The hot liquid passes from the tank at 14 and is led by pipes 21, 22 to the lower portion of the absorber 2,rising through the absorber and transferring a portion of its heat to the cold liquid entering at 15, as herederstood without particular description.

sons which gester 1 cooling,

pipe 27, 1n which case the heated 'li tofore described. The now partially cooled and clear liquid escapes from the absorber at '23 and is led to the evaporating system or otherwise disposed of as may be desired.

Suitable controlling and safety valves are provided in the piping system as will be unprefer to so arrange the piping system that either the absorber or the settlin tank may be temporarily or permanently disconnected for convenience in repairing or for other reamay render it desirable. Thus by means of the inlet valve 24 the inflowing liquid may be directed by pipe 25 to the diwithout assing through the ab sorber, and similar y the clear ll( uid flowing from the tank 3 may be conducte .by ipe; 26 directly to thelevaporators without .urther the absorber being then entirely disconnected from the system. Or the settling tank may e disconnected by closing the valve in pipe 20 and opening the valve in uid from the digester passes directly throug 1 the ab sorber. The precise manner in which the apparatus is usediwill depend to some ex-.

tent u on the degree to which the liquid is heat'e in the digester 1; if the liquid is not hi hly heated therein the importance of the su 'sequent abstraction of heat in the absorber will be correspondingly lessened.

I do not limit myself to the particular means herein shown for separating the solids, but may substitute therefor any suitable inclosed separating device capable of o crating under pressure; nor do I limit myse l to any articular construction of the digester or eater, or of the absorber or cooler.

\Vhen treating saccharine or other solutions in which a flocculation due to the tem- 5 perature occurs, it is found that in practice the impurities do not separate in 'fiocculent iorm'before the liquid reaches the tank 4. This is highly advantageous for the reason that such solutions show no tendency to clog their way to the tank The condition essential tofiflocculation is a reduction of the rate affording sufficient time for flocculation to occur, and this condition is provided in the herein referred toxa s a settling tankfi it is to be understoodthat little or no settling of the solids in the usual meaning of this term occurs therein; the solids are in factconveyed to a point near the bottom ofthe tank by the infiowing liquid, where, owing to their higher specific gravity, they remain until withdrawn. The construction of the tank and the relative position of its inlet and discharge openings, which are so situated that 'the hottest li uid is always in proximity to the outer wal s of the tank, aresuch as to avoid the production of convection currents or any disturbances of the separated matter Obviously the apparatus may be operated intermittently in order to afi'ord any desired period for the settling of the impurities in the tank 4. I

1. In a paratus for separating solids from liquids, a ieater, a separating device, adapted to operate under pressure, a heat-absorbing device and conduits arranged to convey the liquid from said heater tosaid separating device and thence to said heat-absorbing device. 2. In apparatus for separating solids from liquids, a heater, a settling tank adapted to operate under pressure, a heatabsorbing device, and conduits arranged to convey the liquid from said heater to said settling tank and thence to said heat-absorbing device.

3. In apparatus for separating, solids from liquids, a heater, a settling tank adapted to ,operate under pressure and comprising a body portion, a liquid-tight cover, an inlet and outlet For liquid communicating with said tank near the upper )ortion thereof, and means for directing the iiquid in a tortuous path between said inlet and outlet.

4. In apparatus for separating solids Jrom li uids, a heater, a settling tank comprising a )ody portion, a liquid-tight cover, an inlet and outlet For liquid, and means fordireciing the liquid in a tortuous path between said inlet and outlet, a heat-absorbing device, and means for directing the liquid successively through said heater, settling tank and heatabsorbing device.

5. A settling tank comprising a' body portion'having a converging bottom and. an outi let therefrom, a liquid-tight cover, a partial pariition or uptake having a liquid-tight conl nection or scale the pipes which they traversev on I of flow of the liquid under circumstances with said co vcr, and an inlet and outannular ,passage 134.3. While the tank 4 is tion having a converging let for liquid communicating with the ininterior of said tank on opposite sides of said 10 terior of said tank on opposite sides of said uptake. Uptake. In testimony whereof, I afiix my signature 6. A settling tank comfirising a body porin presence of two witnesses.

ottom anden outy 1' let therefrom, an arched liquid-tight cover, EUGEBE, DEMI) a partial partitionor uptake having a liquid- Witnesses tight connection with said cover, and an inlet 1 H. ROBINSON, and outlet for liquid communicating with the I H. GAILLARD.

DISOL A IMER tion having a converging let for liquid communicating with the ininterior of said tank on opposite sides of said 10 terior of said tank on opposite sides of said uptake. Uptake. In testimony whereof, I afiix my signature 6. A settling tank comfirising a body porin presence of two witnesses.

ottom anden outy 1' let therefrom, an arched liquid-tight cover, EUGEBE, DEMI) a partial partitionor uptake having a liquid- Witnesses tight connection with said cover, and an inlet 1 H. ROBINSON, and outlet for liquid communicating with the I H. GAILLARD.

DISOL A IMER DISCLAIMER- 885,45:O.- /'ugwm: W. Dry/ling, New York. N. Y.

Uisvluimer filed Jury-m1 SOLIDS FROM LIQ IDS. Patent dated April 21. 151%. 21, 1914, by the Deming A qrumfus (film mny, assignev.

Enters its disclaimer To the following words. found on linvs I63. 34, and 35 of page- 1 of tinpwitim' tion, to wit: for Um treatnmnt of liquids val-vying smids in suspwhiun :mli.

()ficz'al (Juanita, Jaw/wry Q7, 191$. 

